Can be used to connect either a Honeywell modutrol III or IV motor to a 2 or 3-way valve in modulating or two -position service. For use on Honeywell V5011 and V5013 water and steam valves having a fixed 3/4" lift (stem travel) and 1- 3/8” bonnet. Switch replaces all Q618A or Q601 J, K, L, M linkages. For use on M6184D, M9184D, M8185D, M9164D and M9185D